n(Cu)=3.2g/（64g/mol）=0.05mol
n(HNO3)=0.4mol/L*0.1L=0.04mol
n(H2SO4)=0.2mol/L*0.1L=0.02mo
銅不與稀硫酸反應(yīng),
所以反應(yīng)離子方程式是:
3Cu + 2NO3- + 8H+ = 3Cu2+ + 2NO + 4H2O
3mol..2mol.8mol
n(Cu) 0.04mol (0.04+0.02*2)mol
Cu、NO3-過量,H+恰好反應(yīng)：
n(Cu2+)=n(Cu)=0.03mol,
c(Cu2+)=0.03mol/0.1L=0.3mol/L.